<?php
	if ( function_exists('register_sidebar') )
	register_sidebar();

//remove html tag when saving comments
function preprocess_comment_striptags($commentdata) {
    $commentdata['comment_content'] = strip_tags($commentdata['comment_content']);
    return $commentdata;
}
add_filter('preprocess_comment', 'preprocess_comment_striptags');

// remove html tag when showing comments
function comment_text_striptags($string) {
    return strip_tags($string);
}
add_filter('comment_text', 'comment_text_striptags');

?>